Cant run C# app at customers computer

I have C# application which is using C# DLL named [url removed, login to view] and, in turn, using it as wrapper to [url removed, login to view] At my system (XP-SP2, VS2005 Pro) I was able to build application and run it after I copied manually [url removed, login to view] into app folder. My client have Windows 7, also tried to run app on XP (not sure about SP version), but at his computer exe terminated because DLL is not found. Of course he also have both DLLs at app folder. I need to know what is the reason for such a weird problem, whole project with DLLs and sources available for evaluation here: [url removed, login to view] p.s. should work under Visual Studio 2005, .NET 2.0

## Deliverables

1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done.

2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables):

a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment.

b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request.

3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement).

So far no suggestions helped to solve the problem: 1) Building as Release leads to the same problem 2) Copying to Windows-System32 folder not work (dll not found anyways) 3) Regsvr32 says that the dlls (both of them) cannot be registered